The 4773-0 Clean Connect Sprayer is Uniquely Developed for the use of Nu-Brite 4x (4291-90), Alka-Brite Plus 4x (4120-90) and Tri-Pow'r HD 4x (4371-90) Concentrate Coil Cleaners for Cleaning Outdoor Air Cooled HVAC/R Coils. The Bottles in each of these Cleaners Contain a Specific Dilution Tip Insert Assembly to where the Clean Connect Sprayer Simply is Hooked to the Bottle and Go! No More Pouring and Spilling of Coil Cleaner- the Sprayer Offers a Cleaner Connect System. The Clean Connect System Provides the Opportunity to take less Space on the Truck, Easier to Ship to the Job and Handle at the Jobsite. Sprayer comes with a Carrying Bag